You can pick up open time or trade one of your current trips for a trip in the open time bank. Adding or trading into open time is paid is at two different rates. The normal rate and the critical rate. When scheduling calls you on a day off, you are paid at the junior man rate which is also different. The bottom line is, you need to know the contract really well and understand how the electronic bidding/scheduling software works to make extra money. You don't need to be senior, just a line holder. You can get a line within a month at TYS and DAY after finishing IOE. CLT is about three months after finishing IOE to get a line.